Laboratory Ruins Area 4 Guide

Laboratory Ruins is The Mystery of Arpeggio Fault's Stage 4 Area in Zenless Zone Zero (ZZZ). See the Area 4 guide for each floor, the quest walkthrough, Area 4's password and secret message, and the rewards here!

The Mystery of Arpeggio Fault Event
Fault Surface		Old Observatory		Outpost Beacon
Laboratory Ruins		Turbulent Corridor		Bangboo Password
Slumbering Land Quest			Where the Mystery Went Quest

Laboratory Ruins Stage Details

The Mystery of Arpeggio Fault Stage 4 Details and Floors

Mechanic	Generate 2 chests upon levelling up, all enemies on the same floor ATK +1 upon defeting an enemy.
Floors	52F - Prep Area 55F - Shallows 58F - Mid-Level 61F-A - Depths 64F-A - Fault Floor 94F-B - Ruins 99F-B - Ruin Depths

The Prep Area, Shallows, Mid-Level, Depths, and Fault Floor of Area 4 can be unlocked by completing the floor prior.

However, the Ruins and Ruin Depths can be unlocked after completing the Where the Mystery Went quest and the Turbulent Corridor - Fault Floor.

Part of the Corruption Crisis Quest

The Laboratory Ruins, Area 4, is part of The Mystery of Arpeggio Fault - Corruption Crisis quest. This quest continues on to Turbulent Corridor, Area 5.

Completing the Fault Floor of Laboratory Ruins also unlocks the Turbulent Corridor.

Turbulent Corridor Area 5 Guide

Recommended Data File

Data File	Data File Details
EXP Build-Up	Initial Effects Receive EXP-related Sub Strategies when levelling up.
	Full Effects • Upon stepping on a blank tile for the first time, 40% chance to +1 HP • EXP +5 when the protagonist attacks, but starting from the next level, enemy HP +10 • EXP +20 when exchanging supplies with autonomous robot, but starting from the next level, enemy ATK +8 • EXP +40 upon killing a monster, but starting from the next level, enemy HP +20 • +400% EXP gained

Laboratory Ruins Area 4 Guide

Arpeggio Fault Area 4 Strategy

1. Recruit As Many Agents As Possible
2. Be Cautious Around Random Events
3. Carefully Choose Your Plug-Ins and Resonia

Recruit As Many Agents As Possible

The whole Laboratory Ruins area is huge and each floor has many hidden tiles, so it's better to bring as many agent helpers as you can to help you defeat enemies while you explore.

There are three agents you can recruit at each stage, depending if you have upgraded as many Agent helpers by giving the Pink Gun TV tile 50 and 100 Contribution Points.

Be Cautious Around Random Events

Be cautious when interacting with random events. Most of them can give out rewards or buffs that can help you explore each floor more easily.

However, sometimes these random events may spawn enemies instead, and when you're not careful enough, you might put yourself in a tough spot.

Carefully Choose Your Plug-Ins and Resonia

Always choose your Bangboo Plug-Ins and Resonia wisely. They can either help you explore each floor or make it much more difficult.

We recommend choosing Plug-Ins and Resonia that can give either +HP, +ATK, or both to the protagonist due to the stage mechanics giving out buffs to the enemies a whole lot more compared to the other areas.

Laboratory Ruins Secret Message

Password and Secret Message in Ruin Depths

An easter egg can be seen in Laboratory Ruins Area 4 stage in the in 99F-B - Ruin Depths after collecting the Arpeggio Fault code found throughout the event's stages.

It will spell “CHESSBOARD THANKS SO MUCH FOR PLAYING OUR GAME ❤”

Arpeggio Fault Password Guide

How to Display Laboratory Ruins Message

Arpeggio Fault Password Guide

1. Have at Least 7 Starting Bombs
2. Go to Laboratory Ruins 99F-B
3. Open Chests in Laboratory Ruins 99F-B

Have at Least 7 Starting Bombs

Before heading out to view the secret message, you need to have at least 7 starting bombs from the Tech Tree. Randomize some of your Tech Buff nodes until you can start a run with 7 bombs.

Go to Laboratory Ruins 99F-B

The secret message is located in Laboratory Ruins 99F-B Area 4 stage in the in 99F-B - Ruin Depths. You must complete the Arpeggio Fault Follow-Up Investigation - Where the Mystery Went quest first to access this floor.

Where the Mystery Went Quest Guide

Open Chests in Laboratory Ruins 99F-B

To display the secret message, you must open chests in Laboratory Ruins 99F-B - Ruin Depths.

There is no particular order to follow when opening the chests since the secret message will still be displayed even if some of the chests forming the letters of the message disappear.

All Laboratory Ruins Rewards

Laboratory Ruins Hollow Zero Rewards

Stage	Rewards
Prep Area	Polychrome x30 W-Engine Energy Module x2 Denny x10,000
Shallows	Polychrome x30 W-Engine Energy Module x2 Denny x10,000
Mid-Level	Polychrome x30 W-Engine Energy Module x2 Denny x10,000
Depths	Polychrome x30 W-Engine Energy Module x2 Denny x10,000
Fault Floor	Polychrome x30 W-Engine Energy Module x2 Denny x10,000
Ruins	Polychrome x30 W-Engine Energy Module x2 Denny x10,000
Ruin Depths	Polychrome x30 W-Engine Energy Module x2 Denny x10,000

Stage 4 Event Exclusive Rewards

Stage	Rewards
Complete "Laboratory Ruins: Fault Floor"	Polychrome x50 Senior Investigator Log x2 Denny x10,000
Upgrade you squad 40 times during exploration	Polychrome x30 Specialized Shock Chip x2 Denny x10,000
Pick up Crimson Silk a total of 40 times while exploring	Polychrome x30 Specialized Shock Chip x2 Denny x10,000

Laboratory Ruins Information

Part of The Mystery of Arpeggio Fault Event

Laboratory Ruins is Stage 4 of The Mystery of Arpeggio Fault Hollow Zero Event! During this stage, you must carefully explore through each floor as many hidden tiles are lying around.

The Mystery of Arpeggio Fault Event Guide

Zenless Zone Zero Related Guides

The Mystery of Arpeggio Fault Event Guide

Arpeggio Fault Quests and Stages

Areas	Related Quests
Fault Surface	The Mystery of Arpeggio Fault: Special Investigation
Old Observatory	The Mystery of Arpeggio Fault: Unravelling
Outpost Beacon	The Mystery of Arpeggio Fault: Final Puzzle Piece
Laboratory Ruins (Floor 52-64)	The Mystery of Arpeggio Fault: Corruption Crisis
Turbulent Corridor (Floor 67-81)
Laboratory Ruins (94F-B & 99F-B)	Arpeggio Fault Follow-Up Investigation - Where the Mystery Went
Turbulent Corridor (87F-B & 88F-B)	Arpeggio Fault Follow-Up Investigation - Slumbering Land

Other Arpeggio Fault Guide

Other Event Guides
Password Locations and Arpeggio Fault Secret

Other Current and Upcoming Events

All Events and Schedule